Solids built out of active components can exhibit nonreciprocal elastic coefficients that give
rise to non-Hermitian wave phenomena. Here, we investigate non-Hermitian effects present …

We elaborate that for topological insulators and topological superconductors described by
Dirac models in any dimension and symmetry class, the topological order can be mapped to …

A unified expression for topological invariants was proposed recently to describe the
topological order in Dirac models belonging to any dimension and symmetry class. We …

The quantum geometry in the momentum space of semiconductors and insulators,
described by the quantum metric of the valence-band Bloch state, has been an intriguing …

Parity-time (PT) symmetry plays an important role both in non-Hermitian and topological
systems. In non-Hermitian systems, PT symmetry can lead to an entirely real-energy …

The momentum space of topological insulators and topological superconductors is
equipped with a quantum metric defined from the overlap of neighboring valence band …

Critical phase transitions contain a variety of deep and universal physics and are intimately
tied to thermodynamic quantities through scaling relations. Yet, these notions are …

Topological phase transitions can be described by the theory of critical phenomena and
identified by critical exponents that define their universality classes. This is a consequence …

The investigation and characterization of topological quantum phase transition between
gapless phases is one of the recent interest of research in topological states of matter. We …

The quantum Rabi model (QRM) is a fundamental model for light-matter interactions. A
fascinating feature of the QRM is that it manifests a quantum phase transition which is …